fix(files): prevent autosave data loss on load lag and binary files

Guard FilesView autosave until the selected file has finished loading,
refuse binary/PDF/office/archive text saves, and add a persisted global
autoSaveEnabled setting (default true) under Settings → General.

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

packages/ui/src/lib/api/types.ts

@@ -637,6 +637,7 @@ export interface SettingsPayload {
   nativeNotificationsEnabled?: boolean;
   notificationMode?: 'always' | 'hidden-only';
   autoDeleteEnabled?: boolean;
+  autoSaveEnabled?: boolean;
   autoDeleteAfterDays?: number;
   sessionRetentionAction?: 'archive' | 'delete';
   followUpBehavior?: 'steer' | 'queue';

packages/ui/src/lib/appearanceAutoSave.ts

@@ -31,6 +31,7 @@ type AppearanceSlice = {
   summaryLength: number;
   maxLastMessageLength: number;
   autoDeleteEnabled: boolean;
+  autoSaveEnabled: boolean;
   autoDeleteAfterDays: number;
   sessionRetentionAction: 'archive' | 'delete';
   fontSize: number;
@@ -78,6 +79,7 @@ export const startAppearanceAutoSave = (): void => {
     summaryLength: useUIStore.getState().summaryLength,
     maxLastMessageLength: useUIStore.getState().maxLastMessageLength,
     autoDeleteEnabled: useUIStore.getState().autoDeleteEnabled,
+    autoSaveEnabled: useUIStore.getState().autoSaveEnabled,
     autoDeleteAfterDays: useUIStore.getState().autoDeleteAfterDays,
     sessionRetentionAction: useUIStore.getState().sessionRetentionAction,
     fontSize: useUIStore.getState().fontSize,
@@ -117,6 +119,7 @@ export const startAppearanceAutoSave = (): void => {
       summaryLength: state.summaryLength,
       maxLastMessageLength: state.maxLastMessageLength,
       autoDeleteEnabled: state.autoDeleteEnabled,
+      autoSaveEnabled: state.autoSaveEnabled,
       autoDeleteAfterDays: state.autoDeleteAfterDays,
       sessionRetentionAction: state.sessionRetentionAction,
       fontSize: state.fontSize,
@@ -196,6 +199,9 @@ export const startAppearanceAutoSave = (): void => {
     if (current.autoDeleteEnabled !== previous.autoDeleteEnabled) {
       diff.autoDeleteEnabled = current.autoDeleteEnabled;
     }
+    if (current.autoSaveEnabled !== previous.autoSaveEnabled) {
+      diff.autoSaveEnabled = current.autoSaveEnabled;
+    }
     if (current.autoDeleteAfterDays !== previous.autoDeleteAfterDays) {
       diff.autoDeleteAfterDays = current.autoDeleteAfterDays;
     }

packages/ui/src/lib/desktop.ts

@@ -105,6 +105,7 @@ export type DesktopSettings = {
     renamedGroups?: Record<string, string>;  // groupId -> custom label
   }>;  // Per-provider custom model groups configuration
   autoDeleteEnabled?: boolean;
+  autoSaveEnabled?: boolean;
   autoDeleteAfterDays?: number;
   sessionRetentionAction?: 'archive' | 'delete';
   tunnelProvider?: string;

packages/ui/src/lib/fileEditorAutosave.test.ts

@@ -0,0 +1,60 @@
+import { describe, expect, test } from 'bun:test';
+
+import { shouldAllowFileDraftSave, shouldScheduleFileAutosave } from './fileEditorAutosave';
+
+describe('shouldScheduleFileAutosave', () => {
+  const ready = {
+    autoSaveEnabled: true,
+    isDirty: true,
+    canWrite: true,
+    isSaving: false,
+    fileLoading: false,
+    selectedFilePath: '/repo/a.txt',
+    loadedFilePath: '/repo/a.txt',
+    isNonEditableBinary: false,
+  };
+
+  test('schedules when dirty text file is fully loaded', () => {
+    expect(shouldScheduleFileAutosave(ready)).toBe(true);
+  });
+
+  test('skips while loading or when loaded path mismatches selection', () => {
+    expect(shouldScheduleFileAutosave({ ...ready, fileLoading: true })).toBe(false);
+    expect(shouldScheduleFileAutosave({ ...ready, loadedFilePath: null })).toBe(false);
+    expect(shouldScheduleFileAutosave({ ...ready, loadedFilePath: '/repo/other.txt' })).toBe(false);
+  });
+
+  test('skips when autosave disabled or file is binary', () => {
+    expect(shouldScheduleFileAutosave({ ...ready, autoSaveEnabled: false })).toBe(false);
+    expect(shouldScheduleFileAutosave({ ...ready, isNonEditableBinary: true })).toBe(false);
+  });
+
+  test('skips when not dirty, cannot write, or already saving', () => {
+    expect(shouldScheduleFileAutosave({ ...ready, isDirty: false })).toBe(false);
+    expect(shouldScheduleFileAutosave({ ...ready, canWrite: false })).toBe(false);
+    expect(shouldScheduleFileAutosave({ ...ready, isSaving: true })).toBe(false);
+  });
+});
+
+describe('shouldAllowFileDraftSave', () => {
+  const ready = {
+    selectedFilePath: '/repo/a.txt',
+    loadedFilePath: '/repo/a.txt',
+    fileLoading: false,
+    isDirty: true,
+    draftContent: 'edited',
+    fileContent: 'original',
+    isNonEditableBinary: false,
+  };
+
+  test('allows save for loaded dirty text', () => {
+    expect(shouldAllowFileDraftSave(ready)).toBe(true);
+  });
+
+  test('refuses incomplete load, binary, or clean draft', () => {
+    expect(shouldAllowFileDraftSave({ ...ready, fileLoading: true })).toBe(false);
+    expect(shouldAllowFileDraftSave({ ...ready, loadedFilePath: null })).toBe(false);
+    expect(shouldAllowFileDraftSave({ ...ready, isNonEditableBinary: true })).toBe(false);
+    expect(shouldAllowFileDraftSave({ ...ready, isDirty: false })).toBe(false);
+  });
+});

packages/ui/src/lib/fileEditorAutosave.ts

@@ -0,0 +1,54 @@
+export type FileEditorAutosaveGate = {
+  autoSaveEnabled: boolean;
+  isDirty: boolean;
+  canWrite: boolean;
+  isSaving: boolean;
+  fileLoading: boolean;
+  selectedFilePath: string | null | undefined;
+  loadedFilePath: string | null;
+  /** True when the selected file must never be written as text (binary / non-editable). */
+  isNonEditableBinary: boolean;
+};
+
+/**
+ * Whether the FilesView autosave effect should schedule a debounced save.
+ * Incomplete loads and binary files must never trigger a write.
+ */
+export function shouldScheduleFileAutosave(gate: FileEditorAutosaveGate): boolean {
+  if (!gate.autoSaveEnabled || !gate.isDirty || !gate.canWrite || gate.isSaving) {
+    return false;
+  }
+  if (gate.fileLoading || gate.isNonEditableBinary) {
+    return false;
+  }
+  if (!gate.selectedFilePath || gate.loadedFilePath !== gate.selectedFilePath) {
+    return false;
+  }
+  return true;
+}
+
+export type FileEditorSaveDraftGate = {
+  selectedFilePath: string | null | undefined;
+  loadedFilePath: string | null;
+  fileLoading: boolean;
+  isDirty: boolean;
+  draftContent: string;
+  fileContent: string;
+  isNonEditableBinary: boolean;
+};
+
+/**
+ * Whether saveDraft may write. Refuses empty drafts against stale content and any binary target.
+ */
+export function shouldAllowFileDraftSave(gate: FileEditorSaveDraftGate): boolean {
+  if (!gate.selectedFilePath || !gate.isDirty) {
+    return false;
+  }
+  if (gate.fileLoading || gate.loadedFilePath !== gate.selectedFilePath || gate.isNonEditableBinary) {
+    return false;
+  }
+  if (gate.draftContent === '' && gate.fileContent !== '' && gate.loadedFilePath !== gate.selectedFilePath) {
+    return false;
+  }
+  return true;
+}

packages/ui/src/lib/i18n/messages/en.settings.ts

@@ -1878,6 +1878,9 @@ export const settingsDict = {
   'settings.openchamber.visual.field.promptNavigatorEnabled': 'Prompt Navigator',
   'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
   'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
+  'settings.openchamber.visual.field.autoSaveEnabledAria': 'Auto-save files',
+  'settings.openchamber.visual.field.autoSaveEnabled': 'Auto-save files',
+  'settings.openchamber.visual.field.autoSaveEnabledInfo': 'Automatically save file edits after you stop typing. Disable to require manual save.',
   'settings.openchamber.visual.field.wideChatLayoutAria': 'Wide chat layout',
   'settings.openchamber.visual.field.wideChatLayout': 'Wide Chat Layout',
   'settings.openchamber.visual.field.codeBlockLineWrapAria': 'Wrap code block lines',

packages/ui/src/lib/i18n/messages/en.ts

@@ -1247,6 +1247,8 @@ export const dict = {
   'filesView.editor.showControlsAria': 'Show editor controls',
   'filesView.editor.controlsTitle': 'Editor controls',
   'filesView.editor.pickFileFromTree': 'Pick a file from the tree.',
+  'filesView.editor.cannotPreviewBinary': 'Cannot preview binary file',
+  'filesView.editor.binaryFileDescription': 'This file is binary and cannot be edited in OpenChamber. Download it to open with another app.',
   'filesView.state.loading': 'Loading...',
   'filesView.state.openingFileAtChange': 'Opening file at change...',
   'filesView.tree.search.placeholder': 'Search files...',

packages/ui/src/lib/i18n/messages/es.settings.ts

@@ -1845,6 +1845,9 @@ export const settingsDict = {
   "settings.openchamber.visual.field.promptNavigatorEnabled": "Navegador de prompts",
   "settings.openchamber.visual.field.expandedEditorToolbarAria": "Mostrar siempre la barra de herramientas del editor",
   "settings.openchamber.visual.field.expandedEditorToolbar": "Mostrar siempre la barra de herramientas del editor (anclada bajo las pestañas)",
+  "settings.openchamber.visual.field.autoSaveEnabledAria": "Guardado automático de archivos",
+  "settings.openchamber.visual.field.autoSaveEnabled": "Guardado automático de archivos",
+  "settings.openchamber.visual.field.autoSaveEnabledInfo": "Guarda automáticamente las ediciones del archivo después de dejar de escribir. Desactívalo para exigir un guardado manual.",
   "settings.openchamber.visual.field.wideChatLayoutAria": "Diseño de chat ancho",
   "settings.openchamber.visual.field.wideChatLayout": "Diseño de chat ancho",
   "settings.openchamber.visual.field.showSplitAssistantMessageActionsAria": "Acciones en línea del asistente",

packages/ui/src/lib/i18n/messages/es.ts

@@ -1213,6 +1213,8 @@ export const dict: Record<I18nKey, string> = {
   "filesView.editor.showControlsAria": "Mostrar controles del editor",
   "filesView.editor.controlsTitle": "Controles del editor",
   "filesView.editor.pickFileFromTree": "Selecciona un archivo del árbol.",
+  "filesView.editor.cannotPreviewBinary": "No se puede previsualizar el archivo binario",
+  "filesView.editor.binaryFileDescription": "Este archivo es binario y no se puede editar en OpenChamber. Descárgalo para abrirlo con otra aplicación.",
   "filesView.state.loading": "Cargando...",
   "filesView.state.openingFileAtChange": "Abriendo archivo en cambio...",
   "filesView.tree.search.placeholder": "Buscar archivos...",

packages/ui/src/lib/i18n/messages/fr.settings.ts

@@ -1750,6 +1750,9 @@ export const settingsDict = {
   'settings.openchamber.visual.field.promptNavigatorEnabled': 'Navigateur de prompts',
   'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Toujours afficher la barre d’outils de l’éditeur',
   'settings.openchamber.visual.field.expandedEditorToolbar': 'Toujours afficher la barre d’outils de l’éditeur (ancrée sous les onglets de fichiers)',
+  'settings.openchamber.visual.field.autoSaveEnabledAria': 'Enregistrement automatique des fichiers',
+  'settings.openchamber.visual.field.autoSaveEnabled': 'Enregistrement automatique des fichiers',
+  'settings.openchamber.visual.field.autoSaveEnabledInfo': 'Enregistre automatiquement les modifications après l’arrêt de la saisie. Désactivez pour exiger un enregistrement manuel.',
   'settings.openchamber.visual.field.wideChatLayoutAria': 'Large disposition de discussion',
   'settings.openchamber.visual.field.wideChatLayout': 'Disposition de discussion large',
   'settings.openchamber.visual.field.showSplitAssistantMessageActionsAria': 'Actions intégrées de l\'assistant',

packages/ui/src/lib/i18n/messages/fr.ts

@@ -1075,6 +1075,8 @@ export const dict = {
   'filesView.editor.showControlsAria': 'Afficher les contrôles de l\'éditeur',
   'filesView.editor.controlsTitle': 'Contrôles de l\'éditeur',
   'filesView.editor.pickFileFromTree': 'Choisissez un fichier dans l\'arborescence.',
+  'filesView.editor.cannotPreviewBinary': 'Impossible de prévisualiser le fichier binaire',
+  'filesView.editor.binaryFileDescription': 'Ce fichier est binaire et ne peut pas être modifié dans OpenChamber. Téléchargez-le pour l’ouvrir avec une autre application.',
   'filesView.state.loading': 'Chargement...',
   'filesView.state.openingFileAtChange': 'Ouverture du fichier lors du changement...',
   'filesView.tree.search.placeholder': 'Rechercher des fichiers...',

packages/ui/src/lib/i18n/messages/ja.settings.ts

@@ -1878,6 +1878,9 @@ export const settingsDict = {
   'settings.openchamber.visual.field.promptNavigatorEnabled': 'プロンプトナビゲーター',
   'settings.openchamber.visual.field.expandedEditorToolbarAria': 'エディターツールバーを常に表示',
   'settings.openchamber.visual.field.expandedEditorToolbar': 'エディターツールバーを常に表示（ファイルタブの下にドッキング）',
+  'settings.openchamber.visual.field.autoSaveEnabledAria': 'ファイルの自動保存',
+  'settings.openchamber.visual.field.autoSaveEnabled': 'ファイルの自動保存',
+  'settings.openchamber.visual.field.autoSaveEnabledInfo': '入力を止めた後にファイルの編集内容を自動保存します。無効にすると手動保存が必要になります。',
   'settings.openchamber.visual.field.wideChatLayoutAria': 'ワイドチャットレイアウト',
   'settings.openchamber.visual.field.wideChatLayout': 'ワイドチャットレイアウト',
   'settings.openchamber.visual.field.showSplitAssistantMessageActionsAria': 'インラインアシスタントアクション',

packages/ui/src/lib/i18n/messages/ja.ts

@@ -1243,6 +1243,8 @@ export const dict: Record<I18nKey, string> = {
   'filesView.editor.showControlsAria': 'エディターコントロールを表示',
   'filesView.editor.controlsTitle': 'エディターコントロール',
   'filesView.editor.pickFileFromTree': 'ツリーからファイルを選択してください。',
+  'filesView.editor.cannotPreviewBinary': 'バイナリファイルはプレビューできません',
+  'filesView.editor.binaryFileDescription': 'このファイルはバイナリのため、OpenChamberでは編集できません。別のアプリで開くにはダウンロードしてください。',
   'filesView.state.loading': '読み込み中...',
   'filesView.state.openingFileAtChange': '変更箇所のファイルを開いています...',
   'filesView.tree.search.placeholder': 'ファイルを検索...',

packages/ui/src/lib/i18n/messages/ko.settings.ts

@@ -1845,6 +1845,9 @@ export const settingsDict = {
   'settings.openchamber.visual.field.promptNavigatorEnabled': '프롬프트 탐색기',
   'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
   'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
+  'settings.openchamber.visual.field.autoSaveEnabledAria': '파일 자동 저장',
+  'settings.openchamber.visual.field.autoSaveEnabled': '파일 자동 저장',
+  'settings.openchamber.visual.field.autoSaveEnabledInfo': '입력을 멈춘 후 파일 편집 내용을 자동으로 저장합니다. 끄면 수동으로 저장해야 합니다.',
   'settings.openchamber.visual.field.wideChatLayoutAria': '넓은 채팅 레이아웃',
   'settings.openchamber.visual.field.wideChatLayout': '넓은 채팅 레이아웃',
   'settings.openchamber.visual.field.showSplitAssistantMessageActionsAria': '인라인 어시스턴트 작업',

packages/ui/src/lib/i18n/messages/ko.ts

@@ -1250,6 +1250,8 @@ export const dict: Record<I18nKey, string> = {
   'filesView.editor.showControlsAria': '편집기 컨트롤 표시',
   'filesView.editor.controlsTitle': '편집기 컨트롤',
   'filesView.editor.pickFileFromTree': '트리에서 파일을 선택하세요.',
+  'filesView.editor.cannotPreviewBinary': '바이너리 파일을 미리볼 수 없음',
+  'filesView.editor.binaryFileDescription': '이 파일은 바이너리이므로 OpenChamber에서 편집할 수 없습니다. 다른 앱으로 열려면 다운로드하세요.',
   'filesView.state.loading': '로드 중…',
   'filesView.state.openingFileAtChange': '변경 위치에서 파일 여는 중…',
   'filesView.tree.search.placeholder': '파일 검색…',

packages/ui/src/lib/i18n/messages/pl.settings.ts

@@ -1085,6 +1085,9 @@ export const settingsDict = {
   'settings.openchamber.visual.field.promptNavigatorEnabled': 'Nawigator promptów',
   'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
   'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
+  'settings.openchamber.visual.field.autoSaveEnabledAria': 'Autozapis plików',
+  'settings.openchamber.visual.field.autoSaveEnabled': 'Autozapis plików',
+  'settings.openchamber.visual.field.autoSaveEnabledInfo': 'Automatycznie zapisuje edycje pliku po zatrzymaniu pisania. Wyłącz, aby wymagać ręcznego zapisu.',
   'settings.openchamber.visual.field.terminalFontSize': 'Rozmiar czcionki terminala',
   'settings.openchamber.visual.field.terminalShell': 'Powłoka terminala',
   'settings.openchamber.visual.field.terminalShellAria': 'Wybierz powłokę terminala',

packages/ui/src/lib/i18n/messages/pl.ts

@@ -1728,6 +1728,8 @@ export const dict: Record<I18nKey, string> = {
   'filesView.editor.openFilesAria': 'Otwarte pliki',
   'filesView.editor.openInDesktopApp': 'Otwórz w aplikacji desktopowej',
   'filesView.editor.pickFileFromTree': 'Wybierz plik z drzewa.',
+  'filesView.editor.cannotPreviewBinary': 'Nie można podglądać pliku binarnego',
+  'filesView.editor.binaryFileDescription': 'Ten plik jest binarny i nie można go edytować w OpenChamber. Pobierz go, aby otworzyć w innej aplikacji.',
   'filesView.editor.refreshApps': 'Odśwież aplikacje',
   'filesView.editor.saveAria': 'Zapisz ({shortcut})',
   'filesView.editor.saveFile': 'Zapisz plik',

packages/ui/src/lib/i18n/messages/pt-BR.settings.ts

@@ -1845,6 +1845,9 @@ export const settingsDict = {
   "settings.openchamber.visual.field.promptNavigatorEnabled": "Navegador de prompts",
   "settings.openchamber.visual.field.expandedEditorToolbarAria": "Mostrar sempre a barra de ferramentas do editor",
   "settings.openchamber.visual.field.expandedEditorToolbar": "Mostrar sempre a barra de ferramentas do editor (ancorada sob as abas)",
+  "settings.openchamber.visual.field.autoSaveEnabledAria": "Salvamento automático de arquivos",
+  "settings.openchamber.visual.field.autoSaveEnabled": "Salvamento automático de arquivos",
+  "settings.openchamber.visual.field.autoSaveEnabledInfo": "Salva automaticamente as edições do arquivo depois que você parar de digitar. Desative para exigir salvamento manual.",
   "settings.openchamber.visual.field.wideChatLayoutAria": "Layout de chat amplo",
   "settings.openchamber.visual.field.wideChatLayout": "Layout de chat amplo",
   "settings.openchamber.visual.field.showSplitAssistantMessageActionsAria": "Ações inline do assistente",

packages/ui/src/lib/i18n/messages/pt-BR.ts

@@ -1213,6 +1213,8 @@ export const dict: Record<I18nKey, string> = {
   "filesView.editor.showControlsAria": "Mostrar controles do editor",
   "filesView.editor.controlsTitle": "Controles do editor",
   "filesView.editor.pickFileFromTree": "Selecione um arquivo na árvore.",
+  "filesView.editor.cannotPreviewBinary": "Não é possível pré-visualizar o arquivo binário",
+  "filesView.editor.binaryFileDescription": "Este arquivo é binário e não pode ser editado no OpenChamber. Baixe-o para abrir em outro aplicativo.",
   "filesView.state.loading": "Carregando...",
   "filesView.state.openingFileAtChange": "Abrindo arquivo na alteração...",
   "filesView.tree.search.placeholder": "Pesquisar arquivos...",

packages/ui/src/lib/i18n/messages/uk.settings.ts

@@ -1845,6 +1845,9 @@ export const settingsDict = {
   "settings.openchamber.visual.field.promptNavigatorEnabled": "Навігатор промптів",
   "settings.openchamber.visual.field.expandedEditorToolbarAria": "Завжди показувати панель інструментів редактора",
   "settings.openchamber.visual.field.expandedEditorToolbar": "Завжди показувати панель інструментів редактора (закріплена під вкладками)",
+  "settings.openchamber.visual.field.autoSaveEnabledAria": "Автозбереження файлів",
+  "settings.openchamber.visual.field.autoSaveEnabled": "Автозбереження файлів",
+  "settings.openchamber.visual.field.autoSaveEnabledInfo": "Автоматично зберігати зміни у файлі після того, як ви припините друкувати. Вимкніть, щоб зберігати лише вручну.",
   "settings.openchamber.visual.field.wideChatLayoutAria": "Широкий макет чату",
   "settings.openchamber.visual.field.wideChatLayout": "Широкий макет чату",
   "settings.openchamber.visual.field.showSplitAssistantMessageActionsAria": "Вбудовані дії асистента",

packages/ui/src/lib/i18n/messages/uk.ts

@@ -1213,6 +1213,8 @@ export const dict: Record<I18nKey, string> = {
   "filesView.editor.showControlsAria": "Показати елементи керування редактора",
   "filesView.editor.controlsTitle": "Елементи керування редактора",
   "filesView.editor.pickFileFromTree": "Вибрати файл із дерева.",
+  "filesView.editor.cannotPreviewBinary": "Неможливо попередньо переглянути бінарний файл",
+  "filesView.editor.binaryFileDescription": "Цей файл є бінарним і його не можна редагувати в OpenChamber. Завантажте його, щоб відкрити в іншій програмі.",
   "filesView.state.loading": "Завантаження...",
   "filesView.state.openingFileAtChange": "Відкриття файлу на зміні...",
   "filesView.tree.search.placeholder": "Пошук файлів...",

packages/ui/src/lib/i18n/messages/zh-CN.settings.ts

@@ -1845,6 +1845,9 @@ export const settingsDict = {
   'settings.openchamber.visual.field.promptNavigatorEnabled': '提示词导航',
   'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
   'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
+  'settings.openchamber.visual.field.autoSaveEnabledAria': '自动保存文件',
+  'settings.openchamber.visual.field.autoSaveEnabled': '自动保存文件',
+  'settings.openchamber.visual.field.autoSaveEnabledInfo': '停止输入后自动保存文件编辑内容。关闭后需手动保存。',
   'settings.openchamber.visual.field.wideChatLayoutAria': '宽聊天布局',
   'settings.openchamber.visual.field.wideChatLayout': '宽聊天布局',
   'settings.openchamber.visual.field.showSplitAssistantMessageActionsAria': '内联助手操作',

packages/ui/src/lib/i18n/messages/zh-CN.ts

@@ -1213,6 +1213,8 @@ export const dict: Record<I18nKey, string> = {
   'filesView.editor.showControlsAria': '显示编辑器控制项',
   'filesView.editor.controlsTitle': '编辑器控制项',
   'filesView.editor.pickFileFromTree': '请从文件树中选择一个文件。',
+  'filesView.editor.cannotPreviewBinary': '无法预览二进制文件',
+  'filesView.editor.binaryFileDescription': '此文件为二进制文件，无法在 OpenChamber 中编辑。请下载后使用其他应用打开。',
   'filesView.state.loading': '加载中...',
   'filesView.state.openingFileAtChange': '正在打开变更处的文件...',
   'filesView.tree.search.placeholder': '搜索文件...',

packages/ui/src/lib/i18n/messages/zh-TW.settings.ts

@@ -1751,6 +1751,9 @@
   'settings.openchamber.visual.field.promptNavigatorEnabled': '提示詞導覽',
   'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
   'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
+  'settings.openchamber.visual.field.autoSaveEnabledAria': '自動儲存檔案',
+  'settings.openchamber.visual.field.autoSaveEnabled': '自動儲存檔案',
+  'settings.openchamber.visual.field.autoSaveEnabledInfo': '停止輸入後自動儲存檔案編輯內容。關閉後需手動儲存。',
   'settings.openchamber.visual.field.wideChatLayoutAria': '寬聊天佈局',
   'settings.openchamber.visual.field.wideChatLayout': '寬聊天佈局',
   'settings.openchamber.visual.field.showSplitAssistantMessageActionsAria': '行內助理操作',

packages/ui/src/lib/i18n/messages/zh-TW.ts

@@ -1224,6 +1224,8 @@ export const dict: Record<I18nKey, string> = {
   'filesView.editor.showControlsAria': '顯示編輯器控制項',
   'filesView.editor.controlsTitle': '編輯器控制項',
   'filesView.editor.pickFileFromTree': '請從檔案樹中選擇一個檔案。',
+  'filesView.editor.cannotPreviewBinary': '無法預覽二進位檔案',
+  'filesView.editor.binaryFileDescription': '此檔案為二進位檔案，無法在 OpenChamber 中編輯。請下載後使用其他應用程式開啟。',
   'filesView.state.loading': '載入中...',
   'filesView.state.openingFileAtChange': '正在開啟變更處的檔案...',
   'filesView.tree.search.placeholder': '搜尋檔案...',

packages/ui/src/lib/persistence.ts

@@ -531,6 +531,7 @@ const materializeAuthoritativeUiSettings = (settings: DesktopSettings): DesktopS
     sessionGoalDefaultBudget: defaults.sessionGoalDefaultBudget,
     collapsibleThinkingBlocks: defaults.collapsibleThinkingBlocks,
     autoDeleteEnabled: defaults.autoDeleteEnabled,
+    autoSaveEnabled: defaults.autoSaveEnabled,
     autoDeleteAfterDays: defaults.autoDeleteAfterDays,
     sessionRetentionAction: defaults.sessionRetentionAction,
     followUpBehavior: DEFAULT_FOLLOW_UP_BEHAVIOR,
@@ -636,6 +637,9 @@ const applyDesktopUiPreferences = (settings: DesktopSettings) => {
   if (typeof settings.autoDeleteEnabled === 'boolean' && settings.autoDeleteEnabled !== store.autoDeleteEnabled) {
     store.setAutoDeleteEnabled(settings.autoDeleteEnabled);
   }
+  if (typeof settings.autoSaveEnabled === 'boolean' && settings.autoSaveEnabled !== store.autoSaveEnabled) {
+    store.setAutoSaveEnabled(settings.autoSaveEnabled);
+  }
   if (typeof settings.autoDeleteAfterDays === 'number' && Number.isFinite(settings.autoDeleteAfterDays)) {
     const normalized = Math.max(1, Math.min(365, settings.autoDeleteAfterDays));
     if (normalized !== store.autoDeleteAfterDays) {
@@ -1084,6 +1088,9 @@ const sanitizeWebSettings = (payload: unknown): DesktopSettings | null => {
   if (typeof candidate.autoDeleteEnabled === 'boolean') {
     result.autoDeleteEnabled = candidate.autoDeleteEnabled;
   }
+  if (typeof candidate.autoSaveEnabled === 'boolean') {
+    result.autoSaveEnabled = candidate.autoSaveEnabled;
+  }
   if (typeof candidate.autoDeleteAfterDays === 'number' && Number.isFinite(candidate.autoDeleteAfterDays)) {
     result.autoDeleteAfterDays = candidate.autoDeleteAfterDays;
   }

packages/ui/src/lib/settings/search.ts

@@ -147,6 +147,13 @@ const SETTINGS_SEARCH_ITEMS: readonly SettingsSearchItem[] = [
     // Only the mobile composer applies this offset (ChatInput gates on isMobile).
     isAvailable: (ctx) => ctx.isMobile,
   },
+  {
+    id: 'appearance.auto-save-enabled',
+    page: 'general',
+    titleKey: 'settings.openchamber.visual.field.autoSaveEnabled',
+    descriptionKey: 'settings.openchamber.visual.field.autoSaveEnabledInfo',
+    keywords: ['editor', 'autosave', 'auto-save', 'files', 'save'],
+  },
   {
     id: 'appearance.expanded-editor-toolbar',
     page: 'general',

packages/ui/src/lib/toolHelpers.binary.test.ts

@@ -0,0 +1,44 @@
+import { describe, expect, test } from 'bun:test';
+
+import {
+  getFileExtension,
+  isBinaryFile,
+  isImageFile,
+  isPdfFile,
+  isSvgFile,
+  looksLikeBinaryText,
+} from './toolHelpers';
+
+describe('binary file helpers', () => {
+  test('classifies common binary extensions', () => {
+    expect(isBinaryFile('/repo/docs/report.pdf')).toBe(true);
+    expect(isBinaryFile('/repo/sheet.XLSX')).toBe(true);
+    expect(isBinaryFile('archive.zip')).toBe(true);
+    expect(isBinaryFile('photo.png')).toBe(true);
+    expect(isBinaryFile('notes.docx')).toBe(true);
+    expect(isPdfFile('report.pdf')).toBe(true);
+    expect(isImageFile('photo.png')).toBe(true);
+  });
+
+  test('keeps text and SVG editable', () => {
+    expect(isBinaryFile('/repo/README.md')).toBe(false);
+    expect(isBinaryFile('/repo/src/main.ts')).toBe(false);
+    expect(isBinaryFile('/repo/icon.svg')).toBe(false);
+    expect(isSvgFile('/repo/icon.svg')).toBe(true);
+    expect(isBinaryFile('/repo/.env')).toBe(false);
+  });
+
+  test('getFileExtension ignores leading dots and path separators', () => {
+    expect(getFileExtension('/a/b/c.PDF')).toBe('pdf');
+    expect(getFileExtension('.gitignore')).toBe('');
+    expect(getFileExtension('Makefile')).toBe('');
+  });
+
+  test('looksLikeBinaryText detects nulls, PDF, ZIP, and replacement-heavy content', () => {
+    expect(looksLikeBinaryText('hello\0world')).toBe(true);
+    expect(looksLikeBinaryText('%PDF-1.7\nstream\n...')).toBe(true);
+    expect(looksLikeBinaryText(`PK\u0003\u0004${'x'.repeat(20)}`)).toBe(true);
+    expect(looksLikeBinaryText(`${'\uFFFD'.repeat(40)}${'a'.repeat(40)}`)).toBe(true);
+    expect(looksLikeBinaryText('plain text file\nwith newlines\n')).toBe(false);
+  });
+});

packages/ui/src/lib/toolHelpers.ts

@@ -705,6 +705,84 @@ export function isPdfFile(filePath: string): boolean {
   return ext === 'pdf';
 }
 
+export function isSvgFile(filePath: string): boolean {
+  return filePath.toLowerCase().endsWith('.svg');
+}
+
+/** Known non-text extensions that must not be opened or saved as UTF-8 text. */
+const BINARY_FILE_EXTENSIONS = new Set([
+  // Documents / office
+  'pdf', 'doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx', 'odt', 'ods', 'odp',
+  // Archives / packages
+  'zip', 'rar', '7z', 'gz', 'tgz', 'tar', 'bz2', 'xz', 'jar', 'war', 'apk', 'dmg', 'iso',
+  'deb', 'rpm', 'msi',
+  // Images (svg is text and is excluded via isSvgFile)
+  ...IMAGE_EXTENSIONS.filter((ext) => ext !== 'svg'),
+  // Audio / video
+  'mp3', 'mp4', 'm4a', 'aac', 'flac', 'ogg', 'wav', 'wma', 'avi', 'mov', 'mkv', 'webm', 'wmv',
+  // Fonts
+  'ttf', 'otf', 'woff', 'woff2', 'eot',
+  // Native / bytecode
+  'exe', 'dll', 'so', 'dylib', 'bin', 'class', 'o', 'a', 'lib', 'wasm', 'node',
+  // Databases / locks / misc binary
+  'sqlite', 'sqlite3', 'db', 'dat', 'parquet', 'feather', 'pickle', 'pyc', 'pyo', 'lockb',
+]);
+
+export function getFileExtension(filePath: string): string {
+  const base = filePath.split(/[/\\]/).pop() ?? filePath;
+  const dot = base.lastIndexOf('.');
+  if (dot <= 0 || dot === base.length - 1) {
+    return '';
+  }
+  return base.slice(dot + 1).toLowerCase();
+}
+
+/** True for known binary extensions (including images/PDF). SVG is not binary. */
+export function isBinaryFile(filePath: string): boolean {
+  if (isSvgFile(filePath)) {
+    return false;
+  }
+  const ext = getFileExtension(filePath);
+  return BINARY_FILE_EXTENSIONS.has(ext);
+}
+
+/**
+ * Heuristic for UTF-8 text that is actually binary (or was lossily decoded).
+ * Used as defense-in-depth when extension checks miss a binary file.
+ */
+export function looksLikeBinaryText(content: string): boolean {
+  if (!content) {
+    return false;
+  }
+
+  const sample = content.length > 8192 ? content.slice(0, 8192) : content;
+  if (sample.includes('\0')) {
+    return true;
+  }
+  if (sample.startsWith('%PDF')) {
+    return true;
+  }
+  // ZIP-based formats (docx/xlsx/pptx/jar/apk…) and raw ZIP.
+  if (sample.startsWith('PK\u0003\u0004') || sample.startsWith('PK\u0005\u0006') || sample.startsWith('PK\u0007\u0008')) {
+    return true;
+  }
+
+  let suspicious = 0;
+  for (let index = 0; index < sample.length; index += 1) {
+    const code = sample.charCodeAt(index);
+    if (code === 0xFFFD) {
+      suspicious += 1;
+      continue;
+    }
+    // C0 controls excluding common whitespace (TAB/LF/VT/FF/CR).
+    if (code < 9 || (code > 13 && code < 32) || code === 127) {
+      suspicious += 1;
+    }
+  }
+
+  return sample.length > 0 && suspicious / sample.length > 0.1;
+}
+
 export function getImageMimeType(filePath: string): string {
   const ext = filePath.split('.').pop()?.toLowerCase();
   const mimeMap: Record<string, string> = {